Chase pkg repo rename in cloudware builds

We ship cloudware images without a downloaded copy of the pkg repo
database, since it will typically be wildly out of date by the time
cloudware releases get launched. These paths changed due to the
"FreeBSD" -> "FreeBSD-ports" renaming in /etc/pkg/FreeBSD.conf.

While I'm here, nuke the FreeBSD-ports-kmods repo database too; I
forgot to add that when we added that to /etc/pkg/FreeBSD.conf.

Fixes: c83705a5756e ("Rename FreeBSD* pkg repos to FreeBSD-ports*")